Intel Publishes New Linux P-State Driver
Dirk Brandewie has published a new P-state driver for Intel Core CPUs on Linux. This new cpufreq performance state scaling driver initially is supporting just Sandy Bridge processors but will be expanded to handle other Intel hardware.
Intel's P-State Linux kernel driver is following a similar design to Transmeta's scaling driver. Here's the patch-set description from the kernel mailing list:
This driver implements a scaling driver with an internal governor for Intel Core processors. The driver follows the same model as the Transmeta scaling driver (longrun.c) and implements the setpolicy() instead of target(). Scaling drivers that implement setpolicy() are assmuned to implement internal governors by the cpufreq core. All the logic for selecting the current P state is contained within the driver no external governor is used by the cpufreq core.
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